Water-gage and alarm



(No M odel.) I P. V. DWYER.

WATER GAGE AND ALARM. No.267,'780. Patented Nov. 21, 1882.

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NITED STATES,

PATENT, QFFICE.

FATRLOK V. DWYER, OF GLOVERSVILLEL NEW YORK.

WATER-GAGE AND ALARM.

SPECIFICATION forming part of Letters Patent No. 267,780, dated November 21, 1882,

, Application filed September 5, 1882. (No model.) i r To all whom it may concern Be it known that I, PATRICK V. DWYER, of

- Gloversville,in the county of Fulton and State of New York, have invented certain Improvements in Water-Gages and Alarms, of which the following is a specification.

My invention relates to that class of gages for steam-boilers in which the falling of the Water below a proper lever is made known by the sounding of an alarm; and the invention consists in providing a gage-tube (or a special tube, if preferred) with a close-fitting piston connected with a "alve by aloos ejoint, whereby it may rise and fall a. limited distance with the water withoutaftecting the valve, the opening of which permits steam to pass to a whistle. The invention further consists in providing an outlet or side passage for carrying oil the water produced by condensation of the steam above the piston. and delivering it to the water-inlet tube or to the lower part of the gagetube, thus preventing it from interfering with the action of the piston.

In the accompanying drawings, Figure 1 represents a side elevation of my improved gage and alalm applied to a boiler, and Fig. 2 a vertical central section of the same.

A represents the boiler, and B the gage, consisting of the usual glass tube, 0, connected with the water-space and steam-space of the boiler, respectively, by tubes a and b at the upper and lower ends of the tube 0, the usual metal caps, c and 01, being employed to receive the ends of the gage-tube and of the inlet-tubes a b. Thelower cap,c, is provided with a blowoff cock, 6, as usual, to permit the discharge of sediment, and the upper cap, 01, is surmounted by a steam-whistle, D, of ordinary construction.

E represents a float, which is made in the form of a close'fitting piston filling tube 0 as closely as is consistent with free play or movement, said float or piston being designed to rest upon and to move with the rising and falling water.

From the top of the piston a rod or stem,f, extends upward to the top of the tube 0, where it connects by a loose or sliding joint, g, with an upwardly-closing valve, h,which is normally raised and held to its seat by a spring, 0', surrounding its stem j, which latter extends upthe head or button f, with which it is furnished, being at the time raised up close to the under face of the valve. The loose jointg permits the stemfto fall a limited distance, usually fronl one-half to one inch, before the head f strikes the end of the cage or yoke lin which it plays.

When the water falls sufficiently to allow the piston to move a distanoe greater than the play of the joint 9 the piston, by reason of its own weight and of the pressure of steam above it,

moves down, carrying with it the valve h, and permitting steam to pass from tube (J to the whistleD through passages on, and to cause the whistle to sound the alarm.

It will be seen that if the close-fitting piston be used in the ordinary tube without means of carrying ofiany water which might accumulate or be formed above said piston by the condensation of'steam or moisture, such accumulation would, by the addition of its weight to that of the piston, cause the latter to descend unduly and to sound the alarm at an improper time. To prevent trouble or difitlculty from this cause I- provide a side passageor outlettube, a, opening out through the side of tube 0 and communicating with inlet-tube a, or with the lower part of tube (3, as shown in Fig. 2. The upper opening of this passage or outlet extends verticallya distance equal to the maximum movement of the piston, its upper edge being on line with the highest point reached by the upper face of the piston, so that the water due to condensation above the piston may at all times flow into the side passage or outlet. In this way all effect of the water produced by condensation is obviated.

Thedevice is simple and efficient in action, cheap and durable in construction, and can be applied to any ordinary boiler, taking the place of the ordinary water-gage.

Having thus described my invention, what I claim is- 1. In a water-gage for steam-boilers, the combination of a tube communicating at its upper and lower ends with the interior of the boiler,

and provided with a steam-whistle, a valve arranged within the tube and controlling the de- -li very of steam to the whistle, and a piston fitting closel within the tube and connected with the valve by a sliding joint, substantially as and for the purpose set forth.

4 2. In combination with a water-gage and alarm containing a olosefitting piston, substantially as shown and described, within the gage-tube, an outlet or passage opening into said tube above the piston and communicating with the water-inlet or lower part of the gagetube, whereby the water due to condensation isremoved from above the piston.

3. The herein-described gage, consisting of 1 tube 0, caps c d, Whistle D, valve h, and closefitting piston E,c0nnected with the valve by a loose joint, g. I

4. The herein-described gage and alarm, consisting of tube 0, caps c d, whistle D, valve h, piston E, connected with valve h by sliding joint g, and the tube or passage mopening from water-inlet pipe ainto tube G above the piston E. 1

PATRICK V. DWYER. Witnesses:

WILLIAM W. DODGE,

WALTER S. DODGE. 

